CHECK SENSOR POWER SUPPLY.

1) Connect the ECM connector.

2) Turn the ignition switch to ON.

3) Measure the voltage between electronic throttle connector and engine ground.

Connector & terminal

(E57) No. 5 (+) — Engine ground (−):

4) Check the voltage change by shaking the harness and connector of ECM, and engine harness connector, while monitoring the value with voltage meter.

QUESTION

Is the voltage 4.5 — 5.5 V?

Yes No

Repair the poor contact of ECM connector. Replace the ECM if defective.